Pipe wrench



Oct. 31, 1933. w R MQQRE 1,933,512

PIPE WRENCH Filed 001:. l, 1930 2 Sheets-Sheet l iii 070 7 6 2 ATTORNEY.

Oct. 31, 1933. I w MQQRE 1,933,512

PIPE WRENCH Filed Oct. 1, 1930 2 Sheets-Sheet 2 INV NT /;ZOV%R% BY m ATTORNEY.

Patented Oct. 31, 1933 j I 1,933,51

7? insirso srATEs PM V PIPE'WRENCH p 'Walter Roy Moore, EastiOrange, N L, ass ignorv to The Billings & Spencer. Company, a cor- I poration of Connecticut p lication October 1, 1930. Serial No.t485,753 11' Claims; (Gish-'70)] My invention relates to pipe wrenches. and arrangement of the fittings jaw and being It hasamong its objects to provide an imotherwise improved as'hereinafter described. proved pllpewrelinichCi 'andi, nzore pkarticilarly, a? ,Ctonsiideringf the improgred constguction v mire improve simpl e an s reng en'e wren'c par icu arly, i will be no edthat t e jaw pla es of the chain type which has, infaddition to the 3 are connected, to the opposite. sides of the usual front and rear jawson the side jaw plates, body 5 by means of a bolt 6 (see Fig. 5) A51 an improved and more conveniently usable front shown, this extends through apertures 7, midway fittings jaw so disposed'as to permit use of either between the ends of the plates, and through a theu'sual ja'ws or the fittings jaw atwill, while corresponding aperture 8 in thebody 5, herein, permitting a symmetrical disposition of'the chain terminating in substantially triangular eount erwhen .co-operating with said front or rear jaws sinksS-Which'inturn areformed in opposite faces 7 on the side jawplates and avoiding cutting of of the body and extend towardthe front end the chain by the teeth of the front'fittings jaw ofv the body.- Herein, the parts are held 1 in when the'rear side jaws are in use. Still further clamping relation by, the bolt headjand a nut objects areto provide a new and improved 0011-, ll), both engaging the outer faces of the plates 3. struction of the fittings vjaw .and'new and im- Here it will also ben'oted that the usualqoffset proved, mounting and connecting means therefront portion 11 of the body 5 whichicarries the for, together with a new association and arprojections 21, is not onlyprovided with a usual rangement of that jaw with the wrenchlhandle, ehain slot 12in its upper surface, but alsopro 0 ghain; and-other jaws, and a new pivot connecvidedin its lower surface with'an elongated flat ion-for the chain, all ,wherebyjnew and imseat 13 for the fittings-jaw; Herein; thi /seat proved results are obtained, and the wrench extends from'the usual straight' front face 14 0f structure and its manufacture are'improvedand' the portion 11, angularly" downward to a point simplified These and other objects, and advansubstantially under the axis oi the bolt 6. There, 25 tages ofmy improved construction will, however,v it, will also be noted that itterminates "in a right hei'eirggfter more tully appear. I angltejshoulder 15 providingla substantial abutn e accompanying rawings ave s own men fUpon this seat 13 the fittings jaw 16 is .for purposes of illustration, two embodiments disposed, with its rear end seated against the 3 ,Which my invention mayassume in practice. shoulder 15 and the jaw clamped in position 0 In these drawingsagainst theseat 13 by a'SuitablecIamping mem- Figure 1 is 'a side elevation of my improved ber, herein a screw 1 17, disposed substantially wrench, certain of-the parts being indicated in idw y between h aperture, Ban hooks 2 and I dotted lines and the chain being broken onto h vi ei s head sp 'i a s t b c t rsink 'facilitate illustration; I i p 18' inthe slotted'upper surface of the portion 11 35 Figure 2 is a vertical longitudinal section .a 'i s n t n in through t p a Q throughthe wrench between the jaw plates;. righliangles 0 86 1 3 a rec ved'and 00n- Figure 3 is a plan view of the constructio 'nectedthe 5.. midway e en showninFmures p itsends, herein by threading.

Figure 4 is afront end viewfof the construction P particular-1y considering h fi i w I 1 it will be noted that the same is provided with a shown in Figure 3, l

Figure 5 is a section on line 5-5 of Figure 2; i f w i F j-Qb Ig f g ai 7 Figure 6 is a sectionon line 66 of Figure2; 00.18 .1301" 0 S la on opure 7 is a detail ers active View of the posite sides of this groove, whileathreaded aperfi i H V ture Z'Iisprovide'd midwaybetween'the ends of t K L 1. the'groove-lii'and also spaced from the sides of Flgure 8 defiall P gP Y W w the the later to receive the threaded end of the, screw. s am 1 5 g ffi gg g w Vew m 6, 17. Herein, it will also be noted that the teeth lgm'e 1 s 1 v Q 20 on the fittings jaw are disposed in the same fied formof fittings Jaw. direction as and at aslight angle to the adjacent 50 In h s' u v constructwn have Sh teeth 22,011 the under side of the front end of El handlfi 1 y usual h 2 apda s l r the jaw plates 3. Itwill also be observed that ja plates 3 ls o e tildes the herein the groove ,19 is provided with a rounded a t as W a 115115 n 4 p ed t bottom sloping more abruptly upward near its (to-Op in 3 usual W With the books 2,; this .front end to permit readyfpassage of the chain constr'uction including an improved construction and minimize cutting thereof, while the re- 9 mainder of this bottom is herein also in the form of transverse serrations corresponding to the teeth 20 and formed by having the points of the latter teeth removed to minimize wear on the chain. It will also be noted that the teeth 20 of this ttings jaw are spaced substantially inward from the adjacent teeth 22 on the jaw plates 3 and extend substantially in front and in rear of the rear end thereof. Also, herein, one set of these teeth 20 is disposed adjacent one plate 3, while the other set on the opposite side of the groove 19 is disposed adjacent the other plate 3. It will here be observed that, by reason of this construction, it is thus made possible toprovide two toothed surfaces 20 constituting in effect a plurality of laterally spaced fittings jaws, though formed herein on a single member, and located on opposite sides of the chain groove and adapted to grip a fitting very effectively with a large total tooth length in engagement with the fitting when both of these teeth portions, or jaws 20, engage the same.

Next particularly considering the connections of the chain 4 which, when certain of thejaw plates 3 are used, passes through the groove 19 in the new fittings jaw, it will be noted that this chain instead of being connected at a point adjacent the fittings jaw, is connected to the body 5 on the opposite end of the latter from the fittings jaw. In the structure shown, it will be notedthat the body 5 is herein provided with a shallow arcuate chain slot 25 in its rear end heneath a body portion of substantial section, while short lugs 26 are provided on opposite sides of the same projecting below the body, and the slot terminates well in the rear of the bolt 6., These lugs 26 hereinare in turn provided with registering apertures 2'7 adapted to receive a chain connection screw 28 on which a single elongated, normally depending, chain connecting link 29 for the chain l is pivotally mounted for free movement between the lugs 26. Here it will also be noted that the screw 28 is provided with an annular shoulder 30received in a corresponding and slightly larger recess 31 in one of the p0rtions 26, while its threaded portion 32 is threaded into the bore of the other portion 26. It will also be observed that outside the shoulder 30 is an oppositely flattened head 33 adapted to be readily grasped by a wrench. When the jaw plates are in position, this head 33 is disposed in a round aperture 34 in the inner, face of one of the jaw plates 3, while the opposite end of the screw 28 is provided with a round extremity 35 disposed outside its threaded portion 32 and extending into an aperture 34 in the other jaw plate 3 corresponding to the aperture 34 previously described. Here it will also be noted that the jaw plates 3 which have these apertures 34 in one end thereof, are also provided with corresponding apertures in their opposite ends adapted to receive the protruding ends of the member 28 and accordingly permit reversal of the jaw plates 3 when one set of teeth on the same is worn. Thus, it will be evident that a readily releasable connection is provided for the chain connection 29 and one which will remain connected when the side jaw plates 3 are removed, as during use of the wrench on certain fittings.

In the use of my improved construction, it will be evident that when one set of the teeth 22 is to be used, the chain 4. will be extended around the pipe and caught over the hooks 2 in a usual manner, while when the other set of teeth 22 isv in use, the chain will be similarly connected, but passed through the groove 19. In either case, the fitteeth 22 and so disposed as in no. way to interfere with the use of the teeth 22 or the passage of the chain. More particularly considering the disposition of the chain 4, it will be evident that when the front bottom teeth 22 on the side jaw plates are in use, the chain will not engage the fittings jaw, but, when the rear bottom teeth 22 are in use, it is possible for the chain 4 to lie in various positions in the chain groove 19 in such manner as to produce an effective action while also preventing the cutting of the chain by the teeth of the fittings jaw which would otherwise soon ruin the chain. In other words, the construction is such that, while having a front fittings jaw thereon, the wrench is still enabled to be used normally and effectively with the side jaw plates thereon, not only in connection with the front teeth on the side jaw plates, but also with the rear teeth on these plates and all without the fittings jaw, in any way interfering with normal operation, or abnormally affecting the chain.

' tings jaw teeth 20 then will be inside the working Attention is further particularly directed to the fact that the symmetrically disposed in each of its positions relative to work engaging either of these jaws,'the front fittings jaw in my improved construction being so disposed as to permit such a symmetrical disposition of the chain without cutting of the latter when the rear side jaws are in use. It will further be noted that the fittings jaw is enabled to remain permanently connected to the wrench in such manner as to be readily available for use whenever desired upon mere removal of the one bolt 6 holding on the jaw plates 3, or even more quickly, i. e. without this removal, when the size andshape of the fittings permit. In use, it will also be observed that, as compared with previous fittings jaws, less space is required around the p pe and that, accordingly, the improved construction may be used with increased facility when limited space is available.

As a result of my improvement, it will also be noted that the structure has been substantially improved and'simplified over those prior con-, struciions of the type wherein the fittings jaw has been permanently connected to the wrench andusable at will with or without the jaw plates. For example, as compared with those constructions wherein the fittings jawhas been located,,

at the rear of the wrench with strap links of'the' chain on a rivet at opposite sides of and straddling a central fittings jaw, it will be noted that herein it is made possible to utilize a single chain screw 28, to disconnect the link 29 quickly and readily whenever desired; and also to increase substantially the possible width of the fittings jaw. Also, as compared with those constructions wherein the fittings jaw has been held in place.

by both dowel and bolt connections at opposite ends thereof, it will be noted that only a single centrally located and readily accessible screw 17 is required.

Here attention is also directed to Figure 9 connecting link 29 to connect the chain to the providing an efifective toothed area directly under the chain. It will, however, be noted that in this construction the front tooth is preferably grooved as shown at 36 to provide a short chain passage and thereby avoid cutting of the chain thereby.

While I have in this application specifically dc-' scribed two embodiments which my invention may assume in practice, it will be understood Letters Patent is: i

1. The combination with a chain pipe wrench having on its body a rear chain pivot and a top chain hook, and having a chain pivoted on pivot and engageable with said hook and also jaw plates provided with front and rear teeth and connected to said body, of front fittings jaw means underlying the front end of the wrench body, and.

provided with means for enabling use of said rear teeth without cutting of said chain by said front fittings jaw means. i

2. The combination with a chain pipe wrench having on its body a rear chain pivot and a top chain hook, and having chainpivoted on'said pivot'and engageable' wiih said hook and also jaw plates provided with'front and rear teeth and connected to said body, of front fittings jaw means underlying the front end of the wrench body and having a longitudinally cut away portion for enabling the chain to be disposed in non cutting relation to the fittings jaw teeth during use of said rear teeth.

3. A chain pipe wrench having a chain, a chain pivot, a chain hook, jaw plates having front and rear teeth and a connection with the wrench body between said pivot and hook, and a fittings jaw projecting forwardly beneath said hook having a toothed surface and a chain passage in one end thereof for preventing cutting of the chainwhen the rear teeth on said plates are in use.

4. A chain pipe wrench having a chain, a chain pivot, a chain hook, jaw plates having frontand rear teeth and a connection with the wrench body between said pivot and hook, and spaced fittings jaws between said plates presenting a chain passage therebetween for preventing cutting ofthe chain when the rear teeth on said plates are in use.

5. In a chain pipe wrench, a body having stationary chain carrying lugs, a bolt aperture and chain hook means, jaw plates on opposite sides of said aperture, a bolt in said aperture connecting said plates to said body, a chain connectible to said hook means and having a connecting link between-said lugs, and a pivot connection for said link remaining connected upon removal of said plates and threaded into one of said lugs.

61 In a chain pipe wrench, a body having chain carrying stationary lugs thereon, a jaw plate connecting aperture disposed-out of the path of a chain, and chain hook means, jaw plates having connecting means in saidaperture, a chain having a connecting link between said lugs, and

'a pivot pin for said link remaining connected upon removal of said plates and engaging one of said lugs and threaded in the other.

7. In a chain pipe wrench, a handle having a body provided with a jaw plate aperture, a chain pivoted on said body in rear of said aperture, and a hook on said body in front of said aperture, jaw plates on said body having connecting means in said aperture, fittings jaw.

means; on said body projecting in front of said aperture beneath said hool; presenting a longitudinal chain slot between spaced toothed por-,

jaw means between said aperture and hook.

8. In a chain pipe wrench, a handle having a body provided with a jaw plate aperture, a chain pivot aperture on said body in rear of said ,tions thereon, and connecting means for said aperture, a hook on the top of said body, and a I rearwardly sloping chain abutment portion on said. body below said hook and in front of said plate aperture, jaw plates having front and rear teeth, connecting meansforjsaid plates in said plate aperture, a. chain having a pivot in said ivotaperture, and front fittings jaw means underlying said abutment portion and presenting a chain inside the edgeof certain of itsteeth in which said chain may be disposed dur-- ing use of said rear teeth.

9. A fittings jaw for chain pipe wrenches presenting on its working face a set --'of teeth and having certain of said teeth cut away longitudinally through their working edges to form av chain groove at one end of said jawfor inhibiting cutting of the; chain thereby. I

10. A fittings jaw for chain pipe wrenches presenting on its working face'a plurality of spaced sets of teeth and a longitudinally extending chain groove therebetween extending longitudinally of said jaw through the working edges of certain. 

